WO2012095044A2

WO2012095044A2 - Optical transceiver module, passive optical network system, optical fiber detection method and system

Info

Publication number: WO2012095044A2
Application number: PCT/CN2012/071400
Authority: WO
Inventors: 殷锦蓉; 杨素林
Original assignee: 华为技术有限公司
Priority date: 2012-02-21
Filing date: 2012-02-21
Publication date: 2012-07-19
Also published as: EP2819324A4; CN102714545B; CN102714545A; WO2012126403A3; EP2819324A2; WO2012126403A2; WO2012095044A3; EP2819324B1

Abstract

This application provides an optical transceiver module, comprising an optical assembly and a driving assembly connected to the optical assembly. The optical assembly comprises: a data signal transmitter, for transmitting a first data signal with a first wavelength, and transmitting, under the control of the driving assembly, to an optical fiber network a first test signal with the first wavelength; a test signal receiver, for receiving a reflected signal of the first test signal; a test signal transmitter, for transmitting, under the control of the driving assembly, to the optical fiber network a second test signal with a second wavelength; and a data signal receiver, for receiving a second data signal with the second wavelength, and receiving a reflected signal of the second test signal. The application further provides a passive optical network system and device and an optical fiber detection method and system.

Description

Optical transceiver module, passive optical network system, optical fiber detection method and system

Technical field

The present invention relates to an optical communication technology, and in particular to an optical transceiver module and a passive optical network (PON) system and device, and the present invention also relates to an optical fiber detection method and system. . Background technique

As the demand for bandwidth continues to grow, traditional copper broadband access systems are increasingly facing bandwidth bottlenecks. At the same time, fiber-optic communication technologies with huge bandwidth capacity are becoming more mature, application costs are declining year by year, and fiber access networks become lower. A strong competitor of the first generation of broadband access networks, especially passive optical networks are more competitive.

Generally, a passive optical network system includes an optical line terminal (OLT) at a central office, a plurality of optical network units (ONUs) located on the user side, and a terminal for optical lines. An optical distribution network (ODN) that branches/couples or multiplexes/demultiplexes optical signals between optical network units. The optical line terminal and the optical network unit perform uplink and downlink data transmission and reception through an optical transceiver module (or a data receiving and receiving module) disposed therein.

In the field of optical fiber communication, the Optical Time Domain Ref ectrometer (OTDR) is a commonly used fiber optic test instrument. The OTDR obtains the state information of the optical fiber line by transmitting a test signal to the optical fiber network to be tested and detecting the back reflection and scattering signals of the test signal in the optical fiber network to be tested, thereby providing a fast analysis for the maintenance of the optical network. And fault location means.

In order to simplify the network structure and realize real-time monitoring of the optical distribution network, the industry proposes to integrate the 0TDR test function into the optical transceiver module to realize the integrated 0TDR (also known as E0TDR). In an existing optical transceiver module integrated with the OTDR test function, the 0TDR test signal and the downlink data signal use the same wavelength, and share the same light emitting component for signal transmission. In the optical fiber detection, the 0TDR test signal is superimposed on the downlink data signal by amplitude modulation and transmitted to the optical distribution network. The 0TDR test signal is transmitted during the transmission of the optical distribution network at the event point where the fiber is bent, broken or not tightly connected. The light is scattered or reflected to produce a reflected signal that returns along the original path. The reflected signal is further received by the 0TDR detector inside the optical transceiver module. Further, the 0TDR processor inside the optical line terminal can further analyze the reflected signal and calculate the line attenuation of the optical distribution network and the 0TDR test indicating each fiber event point. curve. However, in a passive optical network system, an optical distribution network usually uses a passive optical splitter for branching/coupling of signals. Since the power loss of the optical splitter is large, it is difficult to use the optical transceiver module of the shared optical transmitting component described above. Fault responsibilities and demarcation of branch fibers are performed directly. Therefore, when using the above scheme for fiber inspection, it is still necessary to combine other means, such as adding a light reflector to the branch fiber to perform fault location, etc., which not only causes an increase in cost, but also increases construction difficulty. Summary of the invention

In view of the above problems, the present application provides an optical transceiver module that can perform fault diagnosis and demarcation of branch fiber faults. Meanwhile, the present application also provides a passive optical network system and device using the optical transceiver module, and a fiber detection method and system.

An optical transceiver module includes an optical component and a driving component connected to the optical component, the optical component comprising: a data signal transmitter for transmitting a first data signal having a first wavelength, and in the driving a first test signal having the first wavelength is transmitted to the optical fiber network under control of the component; the test signal receiver is configured to receive the first reflected signal returned by the first test signal to be reflected by the optical fiber network; a signal transmitter, configured to transmit, by the driving component, a second test signal having a second wavelength to the optical fiber network; and a data signal receiver, configured to receive a second data signal having the second wavelength, And receiving a second reflected signal that is returned by the second test signal to be reflected by the optical fiber network.

A passive optical network system, including an optical line terminal, a plurality of optical network units, and an optical distribution network, wherein the optical line terminal is connected to the plurality of optical network units through the optical distribution network, wherein the optical line terminal and The optical network unit includes an optical transceiver module integrated with a test function, and the optical transceiver module employs an optical transceiver module as described above.

An optical line terminal, comprising a data processing module and an optical transceiver module, wherein the optical transceiver module uses an optical transceiver module as described above, the data processing module is configured to provide a first data signal to the optical transceiver module for transmission, And performing data processing on the second data signal received by the optical transceiver module, and the data processing module is further configured to: according to the first reflected signal and the second reflected signal received by the optical transceiver module, Analysis of fiber optic lines.

A method for detecting a fiber of a passive optical network, comprising: determining whether a fault occurs in a trunk fiber or a distribution fiber of an optical distribution network when a faulty optical network fails; if yes, transmitting a downlink wavelength to the optical distribution network a first test signal, and locating a fault of the trunk fiber or the distribution fiber according to the reflected signal of the first test signal; if not, transmitting a second test signal to the optical distribution network by using an uplink wavelength, and according to Place Deriving a reflected signal of the second test signal to determine the faulty branch fiber or optical network unit.

An optical fiber detection system includes an optical line terminal, a plurality of optical network units, and an optical distribution network, wherein the optical line terminal is connected to the plurality of optical network units through the optical distribution network; the optical distribution network includes a first stage a beam splitter and a plurality of second-stage beamsplitters, wherein the first-stage beam splitter is connected to the optical line terminal through a trunk fiber, and is connected to the plurality of second-stage beam splitters through a distribution fiber, the plurality of The second optical splitter is connected to the optical network unit by using a branch fiber; the optical line terminal includes an optical transceiver module, and the optical transceiver module is configured to send a first test signal to the optical distribution network by using a downlink wavelength, and according to The reflected signal of the first test signal locates a fault of the trunk fiber or the distribution fiber; and is configured to send a second test signal to the optical distribution network by using an uplink wavelength, and according to the second test signal Reflecting the signal to identify the faulty branch fiber or optical network unit.

The optical transceiver module provided by the present application uses a dual-wavelength test signal, wherein the first test signal shares a light-emitting component with the first data signal, and the second test signal and the second data signal share a light-receiving component. The optical transceiver module can receive the first reflected signal and the second reflected signal corresponding to the first test signal and the second test signal. According to the first reflected signal and the second reflected signal, a first test curve and a second test curve can be obtained, thereby implementing fault location of the backbone fiber and the distributed fiber of the fiber network, and analyzing the branch fiber and the optical network unit line. Fault responsibilities and delimitation without the need for additional aid testing. Therefore, the optical transceiver module provided by the present application can perform fault detection and diagnosis analysis on the optical fiber network simply and effectively, which can effectively reduce the 0TDR test cost and reduce the construction difficulty. DRAWINGS

FIG. 1 is a schematic structural diagram of a passive optical network system.

FIG. 2 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present application.

FIG. 3 is a schematic flowchart diagram of a fiber detecting method according to an embodiment of the present application.

FIG. 4 is a schematic structural diagram of an optical component of an optical transceiver module according to another embodiment of the present application.

FIG. 5 is a schematic structural diagram of an optical component of an optical transceiver module according to still another embodiment of the present application.

FIG. 6 is a schematic structural diagram of an optical component of an optical transceiver module according to still another embodiment of the present application.

FIG. 7 is a schematic structural diagram of an optical component of an optical transceiver module according to still another embodiment of the present application.

FIG. 8 is a schematic structural diagram of an optical component of an optical transceiver module according to still another embodiment of the present application. detailed description

The optical transceiver module and the optical fiber detection method provided by the present application are described in detail below with reference to specific embodiments. The optical transceiver module provided by the present application can be applied to a point-to-multipoint optical network such as a passive optical network system. Please refer to FIG. 1, which is a schematic structural diagram of a passive optical network system. The passive optical network system 100 includes at least one optical line termination 110, a plurality of optical network units 120, and an optical distribution network 130. The optical line terminal 110 is coupled to the plurality of optical network units 120 via the optical distribution network 130. The direction from the optical line terminal 110 to the optical network unit 120 is defined as a downlink direction, and the direction from the optical network unit 120 to the optical line terminal 110 is an uplink direction.

The passive optical network system 100 can be a communication network that does not require any active devices to implement data distribution between the optical line terminal 110 and the optical network unit 120, for example, in a specific embodiment, Data distribution between the optical line terminal 110 and the optical network unit 120 can be implemented by passive optical devices (such as optical splitters) in the optical distribution network 130. Moreover, the passive optical network system 100 may be an Asynchronous Transfer Mode Passive Optical Network (ATM PON) system or a Broadband Passive Optical Network (BP0N) system defined by the ITU-T G.983 standard, ITU-T G. 984 Standard defined Gigabit Passive Optical Network (GP0N) system, Ethernet Passive Optical Network (EP0N) defined by IEEE 802. 3ah standard, or next-generation passive optical network (NGA P0N, such as XGP0N or 10G EP0N, etc.). The entire contents of the various passive optical network systems defined by the above-mentioned standards are incorporated herein by reference.

The optical line terminations 110 are typically located at a central location (e.g., Central Office, CO) that can collectively manage the one or more optical network units 120. The optical line terminal 110 can serve as a medium between the optical network unit 120 and an upper layer network (not shown), and the data received from the upper layer network is used as downlink data and forwarded through the optical distribution network 130 to The optical network unit 120, and the uplink data received from the optical network unit 120, are forwarded to the upper layer network.

The specific configuration of the optical line terminal 110 may vary depending on the specific type of the passive optical network 100. For example, in an embodiment, the optical line terminal 110 may include an optical transceiver module 200 and data processing. Module 201. The optical transceiver module 200 can send the downlink data signal provided by the data processing module 201 to the optical network unit 120 through the optical distribution network 130, and receive the optical network unit 120 through the optical distribution network 130. The transmitted uplink data signal, and the uplink data signal is provided to the data processing module 201 for data processing. In addition, in an embodiment, the optical transceiver module 200 may also be integrated with an OTDR test function. For example, the optical transceiver module 200 may further send a test signal to the optical distribution network 130, and receive the test signal. The light distribution network 130 generates a reflected signal that is scattered or reflected, and obtains a test curve according to the reflected signal and further performs fiber line state analysis and fault location. The test signal sent by the optical transceiver module 200 may be a single-wavelength signal. For example, the test signal may use the same wavelength (ie, downlink wavelength) as the downlink data signal, and share the light-emitting component, or The uplink data signal uses the same wavelength (ie, the upstream wavelength) and shares the light receiving component. In a preferred embodiment, the test signal may also be a dual-wavelength signal. For example, the test signal may include a first 0TDR test signal and a second OTDR test signal of different wavelengths, where the first 0TDR The wavelength of the test signal may be the same as the downlink wavelength, and the first 0TDR test signal may share the light emitting component with the downlink data signal; the wavelength of the second OTDR test signal may be the same as the uplink wavelength, and The first 0TDR test signal may share a light receiving component with the uplink data signal.

The optical network unit 120 can be distributedly disposed at a user side location (such as a customer premises). The optical network unit 120 may be a network device for communicating with the optical line terminal 110 and a user. Specifically, the optical network unit 120 may serve as the optical line terminal 110 and the user. For example, the optical network unit 120 may forward downlink data received from the optical line terminal 110 to the user, and pass data received from the user as uplink data through the optical distribution network 130. Forwarded to the optical line terminal 110. It should be understood that the structure of the optical network unit 120 is similar to that of an optical network terminal (OTT). Therefore, in the solution provided in this application, the optical network unit and the optical network terminal can be interchanged.

The specific configuration of the optical network unit 120 may be different depending on the specific type of the passive optical network 100. For example, in an embodiment, the optical network unit 120 may include an optical transceiver module 300 for Receiving a downlink data signal sent by the optical line terminal 110 through the optical distribution network 130, and transmitting an uplink data signal to the optical line terminal 110 through the optical distribution network 130. The specific structure of the optical transceiver module 200 can be similar to that of the optical transceiver module 200 of the optical line terminal 110. For example, the optical transceiver module 300 can also be integrated with the 0TDR test function. Specifically, the optical transceiver module 200 may further send a test signal to the optical distribution network 130, and receive a reflected signal returned by the test signal in the optical distribution network 130 to be scattered or reflected, and according to the The reflected signal performs fiber line state analysis and fault location. The test signal may be a single-wavelength signal. Alternatively, the test signal may also be a dual-wavelength signal. For example, the test signal may include a first 0TDR test signal and a second 0TDR test signal, where The wavelength of the first 0TDR test signal may be the same as the downlink wavelength, and the wavelength of the second OTDR test signal may be the same as the uplink wavelength.

The optical distribution network 130 can be a data distribution system that can include optical fibers, optical couplers, optical splitters, and/or other devices. In one embodiment, the optical fiber, optical coupler, optical splitter, and/or other device may be a passive optical device, in particular, the optical fiber, optical coupler, optical splitter, and/or other The device may be a device that distributes data signals between the optical line terminal 110 and the optical network unit 120 without power support. Pieces. In addition, in other embodiments, the optical distribution network 130 may further include one or more processing devices, such as an optical amplifier or a relay device. In the branching structure shown in FIG. 1, the optical distribution network 130 may specifically extend from the optical line terminal 110 to the plurality of optical network units 120 by means of two-stage splitting, but may be configured as any other. Point-to-multipoint (such as single-stage split or multi-stage split) or point-to-point structure.

Referring to FIG. 1 , the optical distribution network 130 uses a splitter to implement data distribution. The optical distribution network 130 can be deployed in a two-stage splitting manner, including the first level, for reliability and operation and maintenance considerations. The beam splitter 131 and the plurality of second stage beamsplitters 132. The common end of the first-stage optical splitter 131 is connected to the optical transceiver module 200 of the optical line terminal 110 through a lead fiber 133, and the branch ends thereof are respectively connected by a distributed optical fiber 134. To the common end of the second-stage optical splitter 132, the branch ends of each of the second-stage optical splitters 132 are further connected to the optical transceiver module 300 of the corresponding optical network unit 120 through a branch fiber (135). In the downlink direction, the downlink data signal sent by the optical line terminal 110 is first split by the first-stage optical splitter 131, and then split by the second-stage optical splitter 132 to form a multi-path downlink. The signals are transmitted to the respective optical network unit 120. In the uplink direction, the uplink data signals sent by the optical network unit 120 are sequentially combined by the second-stage optical splitter 132 and the first-stage optical splitter 131 to be transmitted to the optical line terminal 110. The first-stage optical splitter 131 can be deployed in an optical distribution frame (ODF) that is closer to the central office, and the second-level optical splitter 132 can be deployed in a remote node (Remote). Node, RN).

The specific implementation of the optical transceiver module provided by the present application is described in detail below with reference to FIG. As described above, the optical transceiver module 200 of the optical line terminal 110 is similar in structure to the optical transceiver module 300 of the optical network unit 120. Therefore, only the structure and function of the optical transceiver module 200 are mainly described below. A person skilled in the art can refer to the following description about the optical transceiver module 200 to learn the implementation of the optical transceiver module 300.

Please refer to FIG. 2 , which is a schematic structural diagram of an optical transceiver module 200 according to an embodiment of the present application. The optical transceiver module 200 can be a single-fiber bidirectional optical module with embedded 0TDR test function. The optical transceiver module 200 includes a driving component 210 for driving the optical component 220, and a light component 220 for performing test signals and data signals under the driving of the driving component 210. The driving component 210 can also perform signal pre-processing on the test signal and/or data signal received by the optical component 220.

For ease of understanding, the following description takes the optical transceiver module 200 applied to the optical line terminal 110 shown in FIG. 1 as an example. The optical component 220 can first be connected to the backbone optical fiber 133 of the optical distribution network 130 through the optical fiber adapter 230, and send a downlink data signal to the optical network unit 120 through the optical distribution network 130 and receive the The uplink data signal sent by the optical network unit 120 is described. Specifically, the optical component 220 can include a data signal transmitter 221, a data signal receiver 222, and a filtering component 223. The data signal transmitter 221 may be a laser diode (LD) for transmitting a downlink data signal having a first wavelength λ 1 (hereinafter referred to as a downlink data signal λ 1 ) _; the data signal receiver The 222 may be a photodiode (PD), such as an Avalanche Photo Diode (APD), for receiving an uplink data signal having a second wavelength of 2 (hereinafter referred to as an uplink data signal λ 2 ). The filtering component 223 can couple at least a portion of the downlink data signal λ 1 transmitted by the data transmitter 221 to the fiber optic adapter 230 and couple at least a portion of the uplink data signal λ 2 input from the fiber optic adapter 230 To the data signal receiver 220.

In an embodiment, the filtering component 223 can include a first wavelength division multiplexing (WDM) filter 227, a second wavelength division multiplexing filter 228, and a beam splitter filter 229. The first wavelength division multiplexing filter 227, the second wavelength division multiplexing filter 228, and the optical splitter filter 229 may be sequentially disposed inside the optical component 220 along the extending direction of the optical fiber adapter 230. The main light path has a certain angle with the main light path. The first wavelength division multiplexing filter 227 may transmit about 100% of the optical signal having the first wavelength into 1, and about y% of the optical signal having the second wavelength λ 2 The reflection and transmission of approximately (100-y) %. The second wavelength division multiplexing filter 228 can transmit about 100% of the optical signal having the first wavelength λ 1 and about 100% of the signal having the second wavelength λ 2 . The beam splitter filter 229 can perform χ% transmission and (100-X)% reflection of the optical signal having the first wavelength λ 1 . In a specific embodiment, the values of x, y may both be 90, and the first wavelength λ 1 and the second wavelength λ 2 may be 1490 nm and 1310 nm, respectively, or 1577 nm and 1270 nm.

The first wavelength division multiplexing filter 227, the second wavelength division multiplexing filter 228, and the beam splitter filter

The transmitted optical path of 229 overlaps with the main optical path of the optical component 220, and the reflection of the first wavelength division multiplexing filter 227, the second wavelength division multiplexing filter 228, and the optical splitter filter 229 The optical paths are substantially perpendicular to the main optical path. The data signal transmitter 221 is coupled to the transmitted optical path of the beam splitter filter 229, and the data signal receiver 222 is coupled to the reflected optical path of the first wavelength division multiplexing filter 227. Therefore, in the optical component 220, the downlink data signal λ 1 transmitted by the data signal transmitter 221 may be transmitted through the optical splitter filter 229 and the second wavelength division multiplexing filter 228. And the first wavelength division multiplexing filter 227 is output through the fiber optic adapter 230, and about y% of the uplink data signal λ 2 input through the fiber optic adapter 230 can be reflected to the data signal receiver 222. Received by the data signal receiver 222 and converted into an electrical signal.

Further, in this embodiment, the data signal transmitter 221 may be further configured to transmit with the first a first OTDR test signal of wavelength λ 1 (hereinafter referred to as a first 0TDR test signal λ 1 '), that is, the first 0TDR test signal λ ΐ ' may share the data signal transmitter with the downlink data signal λ ΐ 221. At least a portion of the first 0TDR test signal λ ΐ ' can also be transmitted to the splitter filter 229, the second wavelength division multiplex filter 228, and the first wavelength division multiplex filter 227. The fiber optic adapter 230 is further output to the optical distribution network 130 via the fiber optic adapter 230. In a specific embodiment, the sending of the first 0TDR test signal λ ΐ ' and the downlink data signal λ 可以 may be independent of each other, for example, when the first 0TDR test signal λ ΐ ' is transmitted. The device 221 pauses the transmission of the downlink data signal λ ;; alternatively, the first OFDM signal λ ΐ ′ may also be superimposed to the downlink data signal λ 1 by amplitude modulation to form a superimposed signal and The fiber optic adapter 230 is output to the optical distribution network 130.

In an embodiment, the optical component 220 can further include a test signal receiver 225 and a test signal transmitter 224, wherein the test signal receiver 225 can be coupled to the reflected light path of the beam splitter filter 229, The test signal transmitter 224 can be coupled to a reflected optical path of the second wavelength division multiplex filter 228.

The test signal receiver 225 can be configured to receive a reflected signal corresponding to the first 0TDR test signal λ ΐ ' (hereinafter referred to as a first reflected signal λ ΐ ' '). Specifically, the first 0TDR test signal λ ΐ ' may be reflected or scattered during transmission of the optical distribution network 130 to form a first reflected signal λ ΐ ' '. The first reflected signal λ ΐ ' ' also has the first wavelength λ 1 and it returns along the original path and is input to the optical component 220 through the fiber adapter 230. In the optical component 220, the first reflected signal λ ΐ ' ' may be further transmitted through the first wavelength division multiplexing filter 227 and the second wavelength division multiplexing filter and transmitted to the a beam splitter filter 229, and, in the beam splitter filter 229, approximately (100-%)% of the first reflected signal λ ΐ ' ' will be reflected to the test signal receiver 225 and tested Received by signal receiver 225. After receiving the first reflected signal λ ΐ ' ', the test signal receiver 225 may further convert it into an electrical signal and provide it to the 0TDR processor 211 in the drive component 210 for signal processing.

The test signal transmitter 224 can be configured to transmit a second OTDR test signal (hereinafter referred to as a second OTDR test signal λ 2 ′) having the second wavelength λ 2 , wherein the second OTT test signal λ 2 ′ Approximately 100% may be reflected by the second wavelength division multiplexing filter 228 to the main optical path of the optical component 220, and approximately (100^)% of the second OTDR test signal λ2' may further pass through the The first wavelength division multiplexer 227 is transmitted to the fiber optic adapter 230.

Similar to the first 0TDR test signal λ ΐ ', the fiber optic adapter 230 may output the second OTT test signal λ2' to the optical distribution network 130. The second OTT test signal λ2' may be reflected or scattered during transmission of the optical distribution network 130 to form a second reflected signal λ2''. The second anti The shot signal λ 2 '' also has the second wavelength input 2, and it returns along the original path and is input to the optical component 220 through the fiber optic adapter 230. In the optical component 220, the second reflected signal λ 2 '' may be further transmitted along the main optical path to the first wavelength division multiplexing filter 227, wherein about 2% of the second reflected signal enters 2 '' will be reflected by the first wavelength division multiplexing filter 227 to the data signal receiver 222.

In this embodiment, the data signal receiver 222 may receive the second reflected signal λ 2 '' corresponding to the second OTDR test signal λ 2 ' in addition to the uplink data signal λ 2 . That is, the second reflected signal λ 2 '' may share the data signal receiver 222 with the uplink data signal λ 2 . In order to prevent the second reflected signal λ 2 ′ from causing a collision with the uplink data signal λ 2 transmitted by the optical network unit 120, the driving component 210 is before starting the transmission of the second OTDR test signal λ 2 ′. The data signal transmitter 221 can drive the data signal transmitter 221 to send an instruction to suspend uplink data transmission to the optical network unit 120 under the control of the data processing module 201 of the optical line terminal 110. In addition, after receiving the second reflected signal λ ₂ ′′, the data signal receiver 222 may further convert the second reflected signal λ 2 ′′ into an electrical signal and provide the same to the driving component 210. The 0TDR processor 211 performs signal processing.

In addition, in order to improve the coupling efficiency between the data signal transmitter 221 and the fiber adapter 230, the first OTT test signal λ 1 ' and/or the data signal transmitter 221 is guaranteed to be transmitted. The downstream data signal λ 1 is coupled into the fiber optic adapter 230 as much as possible, and a first lens 291 can be added between the data signal transmitter 221 and the beam splitter filter 229.

Optionally, in order to protect the data signal transmitter 221, the data signal transmitter 221 is prevented from being damaged due to the return of the first reflected signal λ ΐ ' ' along the original path, in the data signal transmitter 221 and the A first optical isolator 292 can be added between the splitter filters 229 for preventing the first reflected signal λ ΐ ' ' from entering the data signal transmitter 221.

Optionally, the optical component 220 may further include a first light absorber 293, and the first light absorber 293 may be disposed on a side of the beam splitter filter 229 facing away from the test signal receiver 225. The first light absorber 293 can be configured to absorb the light signal generated by the first OTDR test signal λ ΐ ' emitted by the data signal transmitter 221 to be reflected by the beam splitting filter 229 to prevent it from passing through the light. The pedestal of the component 220 and/or the inner surface of the cap of the test signal emitter 224 is secondarily reflected and transmitted through the beam splitter filter 229 by the test signal receiver 225, and further to the first reflected signal λ ΐ ' ' Causes interference.

Similarly, to improve the coupling efficiency between the test signal transmitter 224 and the fiber optic adapter 230, the second OTDR test signal λ 2 ' transmitted by the data signal transmitter 224 is guaranteed to be coupled as much as possible. The fiber optic adapter 230, optionally, the test signal transmitter 224 and the second wavelength division multiplexing filter 228 A second lens 294 can be added between them.

To protect the test signal transmitter 224, the test signal transmitter 224 is prevented from being damaged due to the second reflected signal returning 2 ' ' along the original path, optionally, at the test signal transmitter 224 and the A second optical isolator 295 can be added between the second wavelength division multiplexing filters 228 for blocking the second reflected signal λ 2 ' ' from entering the test signal transmitter 224.

Optionally, the optical component 220 may further include a second light absorber 296, and the second light absorber 296 may be disposed at the first wavelength division multiplexing filter 227 facing away from the data signal receiver 222. On one side, the second light absorber 296 can be configured to absorb the second OTT test signal λ 2 ′ emitted by the test signal transmitter, which is generated by the reflection of the first wavelength division multiplexing filter 227. An optical signal to prevent it from being secondarily reflected by the pedestal of the optical component 220 and received by the data signal receiver 222 through the first wavelength division multiplexing filter 227, and further to the second reflected signal λ 2 ' ' causes interference.

Optionally, the optical component 220 may further include a first Trans-Impedance Amplifier (TIA) and a second transimpedance amplifier. The second transimpedance amplifier is disposed between the test signal receiver 225 and the driving component 210 for performing photoelectric conversion of the first reflected signal λ ΐ ' ' after the test signal receiver 225 Performing signal preamplification; the first transimpedance amplifier is disposed between the data signal receiver 222 and the driving component 210 for the uplink data signal λ 2 at the data signal receiver 222 or The second reflected signal λ 2 ' ' performs photoelectric conversion and performs signal preamplification. Alternatively, the first transimpedance amplifier and the second transimpedance amplifier may also be disposed inside the drive assembly 210.

In this embodiment, the first 0TDR test signal λ ΐ ' may be mainly used to detect optical fiber events occurring in the backbone fiber 133 and the distribution fiber 134 of the optical distribution network 130, and implement the trunk fiber 133 and the distribution fiber. 134 fault location. The second OTT test signal λ 2 ′ can be used to detect the fiber optic events occurring in the branch fiber 135 of the optical distribution network 130 and the optical network unit 120, and implement the faults of the branch fiber 135 and the optical network unit 120. Responsibility and delimitation.

The drive component 210 can include an OTDR processor 211, a data signal driver 212, a test signal driver 213, and a channel selection unit 214. The channel selection unit 214 includes an input terminal 207, a data signal output terminal 208, and a test control terminal 209. The input terminal 207 of the channel selection unit 214 is connected to the optical component 220, and the data signal output of the channel selection unit 214 is The terminal 208 can be coupled to the signal output 217 of the drive component 210 via a limiting amplifier, and the test control terminal 209 of the channel selection unit 214 is coupled to the OFDR processor 211. Alternatively, the data signal output 208 of the channel selection unit 214 may also be directly connected to the signal output 217 of the drive component, and the limiting amplifier is placed at the input of the channel selection unit 214. Between the end 207 and the light assembly 220.

In a specific embodiment, in order to reduce the impact of the test control terminal 209 of the channel selection unit 214 on data reception, the channel selection unit 214 may alternatively adopt the following structure. The input terminal 207 of the channel selection unit 214 and the data signal output terminal 208 are directly connected, and a circuit for implementing channel selection is disposed between the input terminal 207 and the test control terminal 209, and the channel selection is performed. The unit 214 can drive two optical signals provided to the data output terminal 208 and the test control terminal 209 through its input terminal 207 under the control of the OTDR processor 211.

Specifically, the channel selection unit 214 can receive the uplink data signal λ 2 or the second reflection signal λ 2 ′′ output by the data signal receiver 222 of the optical component 220 through the input end 207 thereof, and the channel The selection unit 214 can also perform selective signal forwarding under the control of the OTDR processor 211. For example, in the normal data communication mode, the channel selection unit 214 can establish a transmission channel between the input terminal 207 and the data signal output terminal 208, and disconnect the input terminal 207 and the test control terminal. a transmission channel between 209, thereby forwarding the uplink data signal λ 2 received by the optical component 220 to the signal output terminal 217 to provide the uplink data signal λ 2 to the data of the optical line terminal 110 Processing module 201. In the 0TDR test mode, the channel selection unit 214 may receive a corresponding channel switching command from the 0TDR processor 211 through the test control terminal 209, and disconnect the input terminal 207 and the data signal output terminal. a transmission channel between 208, and establishing a transmission channel between the input terminal 207 and the test control terminal 209, thereby passing the second reflection signal λ 2 ' ' output by the optical component 220 through the test control terminal 209 is provided to the OTDR processor 211 for signal processing.

The OTDR processor 211 is connected to the data signal driver 212 and the test signal driver, respectively.

213 and the channel selection unit 214. The data signal driver 212 and the test signal driver 213 are further connected to the data signal transmitter 221 and the test signal transmitter 224 of the optical component 220, respectively. The data signal driver 212 is configured to drive the data signal transmitter 221 to transmit the downlink data signal λ 1 and/or the first OTDR test signal λ ΐ ', and the test signal driver 213 is used to drive the The test signal transmitter 224 transmits the second OTT test signal λ 2 '. It should be understood that the test signal driver 213 is optional. In other alternative embodiments, the 0TDR processor 211 can also directly drive the test signal transmitter 224 to transmit the second 0TDR test signal λ 2 '.

In the normal data communication mode, the data signal driver 212 can receive downlink data from the data processing module 201 of the optical line terminal 110 through the signal input terminal 218, and modulate the downlink data to the data signal transmitter 221 The first wavelength λ 1 optical signal is transmitted, thereby forming and outputting the downlink data signal λ 1 . In the OTDR test mode, the data signal driver 212 may further receive the first 0TDR test data from the OTDR processor 211, and modulate the first OTDR test data to the data transmitter 221. A wavelength λ ΐ light signal, thereby forming and outputting the first OTDR test signal λ ΐ '. In a specific embodiment, after the optical transceiver module 200 starts the 0TDR test, the data signal driver 212 may suspend the downlink of the data signal transmitter 221 under the control of the data processing module 201 of the optical line terminal 110. Data transmission, alternatively, the data signal driver 21 may also maintain downlink data transmission of the data signal transmitter 221, and superimpose the first OTDR test signal λ ΐ ' onto the downlink data signal by amplitude modulation. λ ΐ, thereby forming a superimposed signal.

In addition, in the 0TDR test mode, the OTDR processor 211 can also provide second OTDR test data to the test signal driver 213, and the data signal driver 212 can modulate the second OTDR test data to the data. The second wavelength λ 2 optical signal emitted by the signal transmitter 221 forms and outputs the second OTDR test signal λ 2 '.

The OTDR processor 211 may be in a standby or low power state in the normal data communication mode, and correspondingly, the transmission channel between the input terminal 207 of the channel selection unit 214 and the data signal output terminal 208 through. When the OTDR processor 211 receives the 0TDR test enable signal from the data processing module 201 of the optical line terminal 110 through the I2C interface (or other control signal line) 219, it can control the related functions of the optical transceiver module 200. The unit enters the 0TDR test mode, including controlling the channel selection unit 214 to disconnect the transmission channel between its input terminal 207 and the data signal output terminal 208, and establishing a transmission channel between the input terminal 207 and the test control terminal 209.

In the OTDR test mode, the OTDR processor 211 can also be connected to the test signal receiver 225 or the second transimpedance amplifier of the optical component 220 for receiving the test signal receiver 225 of the optical component 220. And outputting the first reflected signal λ ΐ ' ', and receiving, by the channel selecting unit 214, the second reflected signal λ 2 ′′ output by the data signal receiver 222 of the optical component 220, and respectively performing the first reflection The signal λ ΐ ' ' and the second reflected signal λ 2 ' ' perform signal preprocessing (including signal amplification, sampling, digital processing, etc.). Further, the 0TDR processor 211 may output the preprocessed reflected signals λ ' and λ 2 ' ' to the data processing module 201 of the optical line terminal 110 through the I2C interface 219 for the data processing. The module 201 performs signal analysis processing to obtain an OTDR test curve of the optical distribution network 130.

Specifically, the data processing module 201 may obtain a first OTDR test curve by analyzing the first reflected signal λ ΐ '' preprocessed by the OTDR processor 211, and perform the light according to the first 0TDR test curve. Optical fiber line analysis and fault location of the backbone fiber 133 and distribution fiber 134 of the distribution network 130; The processing module 201 can obtain a second OTT test curve by analyzing the second reflected signal λ 2 ′′ preprocessed by the OTDR processor 211, and perform branching of the optical distribution network 130 according to the second OTDR test curve. Fiber optic line analysis and fault characterization and demarcation of fiber 135 and optical network unit 120.

Of course, in other alternative embodiments, after obtaining the first OTDR test curve and the second OTDR test curve, the data processing module 201 may further perform comprehensive data processing to obtain a The complete 0TDR test curve for fiber analysis and fault diagnosis of the backbone fiber, distribution fiber, and branch fiber of the optical distribution network 130.

Alternatively, the 0TDR processor 211 may also have fiber line analysis capabilities, i.e., the fiber analysis and fault diagnostic functions of the data analysis module 201 may be implemented within the 0TDR processor 211. Therefore, after the pre-processing of the first reflected signal λ ΐ ' ' and the second reflected signal λ 2 ' ', the OTDR processor 211 may directly analyze the first reflected signal λ ΐ ' ' and The second reflected signal λ 2 ' ' thus obtains the first OTDR test curve and the second OTDR test curve, respectively, and further performs the backbone fiber 133 and the distributed fiber of the optical distribution network 130 according to the first OTDR test curve Optical fiber line analysis and fault location of 134, and line analysis and fault characterization and demarcation of branch fiber 135 and optical network unit 120 of said optical distribution network 130.

In a specific implementation, in the 0TDR test mode, the 0TDR processor 211 of the driving component 210 may first initiate the transmission of the first OTDR test signal λ ΐ ' to perform the primary kilo-fiber 133 and the distributed optical fiber. The fault location of 134, and thereafter the activation of the second OTT test signal λ 2 ' is initiated to perform fault characterization and delimitation with respect to the branch fiber 135 and the optical network unit 120.

For example, if the same processing module is used in the 0TDR processor 211 to process the first 0TDR test signal into 1 ', the first reflected signal λ ΐ ' ' and the second OTDR test signal λ 2 ' and the second reflected signal λ 2 ' ' The 0TDR processor 211 can select to establish a connection with the data signal driver 212 and/or the test signal receiver 225, the test signal driver 213, and/or the channel selection unit 214 in a time-sharing manner.

When the transmission of the first 0TDR test signal λ ΐ ' is initiated, the OTDR processor 211 establishes a connection with the data signal driver 212 and/or the OTDR test signal receiver 225, and disconnects the test signal driver 213 and/or channel selection. The connection of unit 214, thereby controlling the data signal driver 212 to drive the data signal transmitter 221 to transmit the first 0TDR test signal λ ΐ ' and receiving and processing the first reflection received by the test signal receiver 225 Signal λ ΐ '' . When the transmission of the second OTDR test signal λ 2 ' is initiated, the OTDR processor 211 can establish a connection with the test signal driver 213 and/or the channel selection unit 214 and disconnect the data signal driver 212 and/or test signal reception. The connection of the device 225, thereby controlling the test signal driver 213 to drive The test signal transmitter 224 transmits the second OTDR test signal λ2' and receives and processes the second reflected signal λ 2'' received by the data signal receiver 222.

Of course, since the wavelengths of the first 0TDR test signal λ ΐ ' and the second OTDR test signal λ2 ′ are different, the two do not interfere with each other. In other alternative embodiments, when the 0TDR processor 211 is When the processing of the first 0TDR test signal λ ΐ ' , the first reflected signal λ ΐ ' ' and the second OTDR test signal λ2 ′ and the second reflected signal λ 2 ′′ are independent of each other, the OTDR processor 211 may simultaneously Activating the first OTDR test signal λ ΐ ' and the second OTDR test signal λ2 ′ to simultaneously perform fault location with respect to the trunk fiber 133 and the distribution fiber 134 and the branch fiber 135 and the optical network unit 120 Fault responsibilities and delimitation.

The optical transceiver module 200 integrated with the 0TDR test function provided in this embodiment uses a dual-wavelength 0TDR test signal, wherein the first 0TDR test signal λ ΐ ' shares the light-emitting component with the downlink data signal λ ,, and the second 0TDR test signal λ 2 The optical receiving component is shared with the uplink data signal λ 2 , and the optical transceiver module 200 can receive the first corresponding to the first OTDR test signal λ ΐ ' and the second OTDR test signal λ 2 ′. The reflected signal λ ΐ '' and the second reflected signal λ2', . According to the first reflected signal λ ΐ '' and the second reflected signal λ 2 ′ ′, a first 0TDR test curve and a second OTDR test curve can be obtained, thereby implementing the backbone fiber 133 of the optical distribution network 130 and Fault location of the distribution fiber 134 and line analysis and fault characterization and demarcation of the branch fiber 135 and the optical network unit 120 of the optical distribution network 130 without the need for additional auxiliary testing means (eg, adding a light reflector to the branch fiber) Wait). Therefore, the optical transceiver module 200 provided by the present application can perform fault detection and diagnosis analysis on the optical fiber network simply and effectively, which can effectively reduce the cost of the 0TDR test and reduce the construction difficulty. Based on the optical transceiver module 200, the present application further provides a fiber detection method for a passive optical network system. FIG. 3 is a schematic flowchart of a method for detecting an optical fiber according to an embodiment of the present disclosure. The method for detecting an optical fiber includes: Step S1: Receive a 0TDR test start command, and determine a 0TDR test type according to the 0TDR test start command. . If the 0TDR test type is manual start or routine start and only the OTDR test based on the first wavelength λ 1 (ie, the first OTDR test) is started, step S2 is performed; if the 0TDR test type is manual start or routine start And only starting the OTDR test based on the second wavelength λ2 (ie, the second OTDR test), performing step S3; if the 0TDR test type is manual start or routine start and simultaneously starting the first 0TDR test and the second 0TDR test, executing Step S4; If the 0TDR test type is an automatic test, step S6 is performed. The manual startup may be used by the operator to input a startup test command through the command line control terminal of the optical line terminal 110 or the operation interface of the network management system. The routine startup may set an activation test period for the operator in the optical line terminal U0 or the network management system, and automatically trigger the optical line terminal 110 to start the 0TDR test when the test period arrives. The test may also be initiated by the optical line terminal 110 or the network management system by conditions such as alarm and/or performance statistics.

Step S2: The optical transceiver module 200 of the optical line terminal 110 starts the first 0TDR test, and obtains the first 0TDR test curve. After the test is completed, step S10 is performed.

Step S3: The optical transceiver module of the optical line terminal 110 starts the second 0TDR test to obtain the second 0TDR test curve. After the test is completed, step S10 is performed.

Step S4: The optical transceiver module of the optical line terminal 110 starts the first 0TDR test, obtains the first 0TDR test curve, and executes step S5 after the test is completed.

Step S5: The optical transceiver module of the optical line terminal 110 starts the second 0TDR test, and obtains the second 0TDR test curve. After the test is completed, step S10 is performed.

In a specific embodiment, step S4 and step S5 can be exchanged, and the second 0TDR test can be started first, and then the first 0TDR test is started.

Step S6: The optical line terminal 110 or the network management system collects information such as alarms, performance statistics, and optical module parameters of the optical line terminal 110 and/or the optical network unit 120, where the alarm information may be a Transport Convergence (TC) layer alarm. And/or ONT Management and Control Interface (0MCI) alarms, such as L0S, Loss of Signal alarms. The performance statistics may include Bit Interleaved Parity (BIP) errors, etc., and the optical module parameters may include transmit optical power, received optical power, polarization current, operating voltage, operating temperature, and the like.

Step S7: The optical line terminal 110 or the network management system determines whether the fault occurs in the trunk fiber 133 or the distribution fiber 134 of the optical distribution network 130. If the fault occurs in the trunk fiber 133 or the distribution fiber 134, step S8 is performed; otherwise, step S9 is performed.

Specifically, in step S7, the optical line terminal 110 or the network management system can determine whether the fault occurs in the trunk fiber 133 or the distribution fiber of the optical distribution network 130 according to the ratio of the alarm and the performance parameter degradation of each optical network unit 120. 134. For example, if all the optical network units 120 in the system have alarms or performance degradation at the same time, it can be determined that the fault occurs in the trunk fiber 133; if multiple optical network units 120 connected to a certain distribution fiber 134 have alarms or performance degradation at the same time, It can be determined that a fault has occurred in the distribution fiber 134.

Step S8: The optical transceiver module of the optical line terminal 110 starts the first 0TDR test, and obtains the first 0TDR test curve. After the test is completed, step S10 is performed.

Taking the optical transceiver module 200 shown in FIG. 2 as an example, specifically, when the optical line terminal 110 can send the first 0TDR to the 0TDR processor 211 of the optical transceiver module 200 through the I2C interface (or other control signal line) 219 Test the start command.

The 0TDR processor 211 is in a standby or low power state before receiving the 0TDR test start command, and after receiving the first wavelength 0TDR test start command, the 0TDR processor 211 may go to the data signal driver 212. Providing first 0TDR test data, the data signal driver 212 further modulating the first 0TDR test data to a first wavelength λ 1 (ie, downlink data wavelength λ 1 ) optical signal transmitted by the data signal transmitter 221, thereby The first 0TDR test signal λ 1 ' is formed and output. The first 0TDR test signal λ ΐ ' transmitted by the data signal transmitter 221 is transmitted to the fiber optic adapter 230 through the filtering component 223 and output to the optical distribution network 130.

The first 0TDR test signal λ 1 'is transmitted and/or scattered during transmission of the optical distribution network 130 and forms a first reflected signal λ ΐ ' ' that returns along the original path. The first reflected signal λ ΐ ' ' is input from the fiber optic adapter 230 and transmitted to the test signal receiver 225 via the filtering component 223. The test signal receiver 225 further converts it into an electrical signal and feeds it back to the 0TDR processor 211. The 0TDR processor 211 performs preprocessing on the first reflected signal λ ΐ ' ', such as signal amplification, sampling, digital processing, etc., and the preprocessed signal may be further provided to other functional modules, such as the optical line. The data processing module 201 of the terminal 110 performs an analysis to obtain a first OTT test curve.

Step S9: The optical transceiver module of the optical line terminal 110 starts the second 0TDR test to obtain the second 0TDR test curve. After the test is completed, step S10 is performed.

Taking the optical transceiver module 200 shown in FIG. 2 as an example, specifically, the optical line terminal 110 may suspend allocation of uplink data slots to stop the optical network unit 120 from transmitting uplink data, through an I2C interface (or other control signal lines). 219 sends a second OTDR test start command to the 0TDR processor 211 of the optical transceiver module 200. After receiving the second OTDR test start command, the OTDR processor 211 can control the channel selection unit 214 to establish a transmission channel between the input terminal 207 and the data signal output terminal 208. Moreover, the OTDR processor 211 also provides second OTT test data to the test signal driver 213, and the test signal driver 213 further modulates the second OTDR test data to the test signal transmitter 224. The two wavelengths enter an optical signal of 2 (i.e., the upstream data wavelength λ 2), thereby forming and outputting the second OTDR test signal λ 2 '. The second OTT test signal λ 2 ' transmitted by the test signal transmitter 224 is transmitted to the fiber optic adapter 230 through the filtering component 223 and output to the optical distribution network 130. The second OTT test signal λ 2 ' reflects and/or scatters during transmission of the optical distribution network 130 and forms a second reflected signal λ 2 '' that returns along the original path. The second reflected signal λ 2 '' is input from the fiber optic adapter 230 and transmitted to the data signal receiver 222 via the filtering component 223. The data signal receiver 222 further converts it into an electrical signal and provides it to the OFDR processor 211 via the channel selection unit 214. The 0TDR processor 211 performs 'preprocessing of the second reflected signal λ 2 ', such as signal amplification, sampling, digital processing, etc., and the preprocessed signal can be further provided to other functional modules, such as the optical line. The data processing module 201 of the terminal 110 performs an analysis to obtain a second OTT test curve.

S10: Integrate information such as 0TDR test curve, 0TDR reference curve, alarm, performance statistics and optical module parameters for optical distribution network and optical network unit analysis and fault diagnosis.

Specifically, the optical line terminal 110 or the network management system can determine whether the system is faulty by using information such as alarms, performance statistics, and optical module parameters, and compare the first 0TDR test curve with the first 0TDR reference 0TDR test curve. Whether the main fiber 133 and the distribution fiber 134 are deteriorated or malfunction.

If the system is operating normally and the first 0TDR test curve is consistent with the first 0TDR reference curve, it can be determined that the trunk fiber 133 and the distribution fiber 134 are normal.

If the system is operating normally, but the first 0TDR test curve is inconsistent with the first 0TDR reference curve, it may be determined that the backbone fiber 133 and/or the distribution fiber 134 are degraded, and may be determined according to the inconsistent position of the first 0TDR test curve and the first 0TDR reference curve. The specific location where degradation occurs.

If the system runs abnormally but the first 0TDR test curve is consistent with the first 0TDR reference curve, it can be determined that the trunk fiber 133 and the distribution fiber 134 are normal, and the fault may occur on the branch fiber 135 or the optical network unit 120, specifically by analyzing the second OTDR. The test curve is further judged; otherwise, the deterioration of the trunk fiber 133 and/or the distribution fiber 134 may be determined, and the specific location of the fault may be determined according to the inconsistent position of the first 0TDR test curve and the first 0TDR reference curve.

The optical line terminal 110 or the network management system may further compare the second 0TDR test curve with the second 0TDR reference curve to determine whether the branch fiber 135 and the optical network unit 120 are degraded or faulty.

If the system is operating normally and the second 0TDR test curve obtained by the test is consistent with the second 0TDR reference 0TDR test curve, it can be judged that the branch fiber 135 and the optical network unit 120 are normal.

If the system is operating normally, but the second 0TDR test curve is compared with the reference 0TDR test curve, if a certain reflection peak disappears or the reflection peak height decreases, the branch fiber corresponding to the reflection peak may be determined according to the reflection peak. 135 has deteriorated.

If the system is operating abnormally and the second OTT test curve is inversed compared to the reference 0TDR test curve If the peak disappears or the height of the reflection peak decreases, the branch fiber 135 corresponding to the reflection peak may be determined to be faulty according to the reflection peak.

If the system is operating abnormally but the second 0TDR test curve is consistent with the second 0TDR reference curve, it can be determined that an optical network unit 120 has failed.

Of course, in the specific embodiment, after the optical transceiver module 200 completes the fault location of the trunk fiber 133 or the distribution fiber 134 in step S8, step S9 may be further performed to determine whether the branch fiber 135 or the optical network unit 120 is also simultaneously error occured.

Optionally, in a specific embodiment, when the manual start or the routine start or the automatic test condition is met, the first 0TDR test and the second 0TDR test may be started to obtain the first 0TDR test curve and the second 0TDR test curve respectively, and Collecting information such as alarms, performance statistics, and optical module parameters, and integrating the first 0TDR test curve, the first 0TDR reference curve, the second 0TDR test curve, the second 0TDR reference curve, the alarm, the performance statistics, and the optical module parameters to perform the optical distribution network 130. And analysis and diagnosis of the optical network unit 120.

Optionally, in a specific embodiment, after obtaining the first 0TDR test curve and the second 0TDR test curve, the data may be further processed to obtain a primary optical fiber that can be used by the optical distribution network 130. A complete 0TDR test curve for fiber analysis and fault diagnosis of the distributed fiber and the branch fiber, and the optical distribution network 130 and the optical network unit 120 are combined with information such as the complete OTDR test curve, 0TDR reference curve, alarm, performance statistics, and optical module parameters. Analysis and diagnosis. In addition to the structure shown in FIG. 2, the optical transceiver module 200 provided by the present application may have other structures. The structure of other alternative implementations of the optical transceiver module 200 provided by the present application is described below with reference to FIG. 4 to FIG.

Please refer to FIG. 4 , which is a schematic structural diagram of an optical component 420 of an optical transceiver module according to another embodiment of the present application. The structure of the optical component 420 is similar to that of the optical component 220 of the optical transceiver module 200 shown in FIG. 2, the main difference being that in the optical component 220 shown in FIG. 2, the test signal transmitter 224 and the test The signal receiver 225 is located on a different side of the main optical path of the optical component 220, and in the optical component 420, by setting the tilt direction of the second wavelength division multiplexing filter 428, the test signal transmitter 424 and the test Signal receiver 425 can be located on the same side of the main optical path of optical component 420.

Please refer to FIG. 5 , which is a schematic structural diagram of an optical component 520 of an optical transceiver module according to another embodiment of the present application. The structure of the optical component 520 is similar to that of the optical component 220 of the optical transceiver module 200 shown in FIG. 2, the main difference being that, in the optical component 220 shown in FIG. 2, the test signal transmitter 224 is located in the a reflected optical path of the second wavelength division multiplexing filter 228, the data signal receiver 222 being located in the first wavelength division multiplexing filter 227 In the optical component 520, the test signal transmitter 524 is located in the reflected optical path of the first wavelength division multiplexing filter 527, and the data signal receiver 522 is located in the reflected optical path of the second wavelength division multiplexing filter 528. Moreover, in this embodiment, to ensure the performance of the optical component 520, the first wavelength division multiplexing filter 527 can be adjusted to be approximately 90%.

Please refer to FIG. 6, which is a schematic structural diagram of an optical component 620 of an optical transceiver module according to another embodiment of the present application. The structure of the optical component 620 is similar to that of the optical component 520 shown in FIG. 5, the main difference being that in the optical component 520 shown in FIG. 5, the test signal transmitter 524 and the data signal receiver 522 are located. The same side of the main optical path of the optical component 520, and in the optical component 620, by setting the tilt direction of the first wavelength division multiplexing filter 627, the test signal transmitter 624 and the data signal receiver 622 can Located on different sides of the main light path of the light assembly 620.

Alternatively, in the optical transceiver assemblies 520 and 620 shown in Figs. 5 and 6, the first wavelength division multiplexing filters 527 and 627 may also be replaced with splitter filters. Specifically, when the first wavelength division multiplexing filters 527 and 627 are replaced by a splitter filter, the optical splitter filter may have an optical signal having the first wavelength λ 1 and have the second The optical signals of wavelength λ 2 all undergo approximately 90% transmission and approximately 10% reflection.

Please refer to FIG. 7, which is a schematic structural diagram of an optical component 720 of an optical transceiver module according to another embodiment of the present application. The structure of the optical component 720 is similar to that of the optical component 220 of the optical transceiver module 200 shown in FIG. 2, the main difference being that in the optical component 720, the wavelength division multiplexing filter 728 is located in the optical splitter filter 729 and The first wavelength division multiplexing filter 227 shown in FIG. 2 is replaced by another optical splitter filter 727, and the optical splitter filter 727 is located in the reflected optical path of the wavelength division multiplexing filter 728. And the beam splitter filter 727 can perform % transmission and (100% reflection) of the optical signal of the second wavelength λ 2 , where y can be 10. In addition, in the optical component 720, the test signal transmitter 724 The transmission optical path of the optical splitter filter 727 is located, and the data signal receiver 722 is located at the reflected optical path of the optical splitter filter 727. Alternatively, the test signal transmitter 724 may also be located in the optical splitter filter. The reflected light path of 727, and the data signal receiver 722 is located in the transmitted light path of the splitter filter 727.

Optionally, in the optical component 720 shown in FIG. 7, the test signal transmitter 724, the data signal receiver 722, the beam splitter filter 727, and the first transimpedance amplifier may be packaged in a T0-CAN package. That is, the first TO-CAN module is formed; and the data signal transmitter 721, the test signal receiver 725, the beam splitter filter 729, and the second transimpedance amplifier can also be packaged in a TO-CAN, that is, the second TO- is formed. CAN module.

Please refer to FIG. 8 , which is a schematic structural diagram of an optical component 820 of an optical transceiver module according to another embodiment of the present application. The structure of the optical component 820 is similar to the optical component 220 of the optical transceiver module 200 shown in FIG. 2, and the main area The other is that the filtering component of the optical component 820 and the position of the signal transmitter or receiver are different from the optical component 220 shown in FIG. 2.

Specifically, the filtering component of the optical component 820 includes a beam splitter filter 829, a first wavelength division multiplexing filter 827, and a second wavelength division multiplexing filter 828. The optical splitter filter 829 is located in the main optical path of the extending direction of the optical fiber adapter 830, and the optical splitter filter 829 can transmit about χ% of the optical signal of the first wavelength λ 1 and about (100-χ)%. Reflecting, and transmitting about y% of the optical signal of the second wavelength λ 2 and about (100- y) % of the reflection, wherein x, y may be 90. Further, the transmitted light path of the spectroscope filter 829 coincides with the main optical path, and the reflected optical path is perpendicular to the main optical path.

The first wavelength division multiplexing filter 827 is located at a reflected optical path of the beam splitter filter 829, which can reflect about 100% of the optical signal of the first wavelength λ 1 and light of the second wavelength λ 2 The signal is transmitted at approximately 100%. Moreover, the test signal receiver 825 is located in the reflected optical path of the first wavelength division multiplexing filter 827, and the test signal transmitter 824 is located in the transmitted optical path of the first wavelength division multiplexing filter 827. Alternatively, the test signal receiver 825 may also be located in the transmitted optical path of the first wavelength division multiplexing filter 827, and the test signal transmitter 824 is located in the first wavelength division multiplexing filter 827. Reflected light path.

The second wavelength division multiplexing filter 828 is located in the transmitted optical path of the optical splitter filter 829, which can transmit about 100% of the optical signal of the first wavelength λ 1 and the light of the second wavelength λ 2 The signal is approximately 100% reflective. Also, the data signal receiver 822 is located in the reflected optical path of the second wavelength division multiplexing filter 828, and the data signal transmitter 821 is located in the transmitted optical path of the second wavelength division multiplexing filter 828. Alternatively, the OR data signal receiver 822 may also be located in the transmitted optical path of the second wavelength division multiplexing filter 828, and the data signal transmitter 821 is located in the second wavelength division multiplexing filter 828. The reflected light path.

Optionally, in the optical component 820 shown in FIG. 8, the first wavelength division multiplexing filter 827, the test signal transmitter 824, the test signal receiver 825, and the second transimpedance amplifier may be The same T0-CAN package, that is, the test signal is transmitted and received T0-CAN. The second wavelength division multiplexing filter 828, the data signal transmitter 821, the data signal receiver 822 and the first transimpedance amplifier may be packaged in another T0-CAN, that is, the data signal transceiving T0_CAN is formed.

The functions of data transmission and reception and OTDR testing when the functions of the various functional units within the optical components 420-820 of FIGS. 4 and 8 and their application to the passive optical network system 100 shown in FIG. 1 can be referred to FIG. 2 and FIG. The related description of the optical transceiver module 200 will not be described below.

The foregoing is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes within the technical scope disclosed in the present application. Modifications or substitutions are intended to be covered by the scope of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

Rights request

An optical transceiver module, comprising: an optical component and a driving component connected to the optical component, the optical component comprising:

a data signal transmitter for transmitting a first data signal having a first wavelength and transmitting a first test signal having the first wavelength to a fiber optic network under control of the driving component;

a test signal receiver, configured to receive a first reflected signal generated by the first test signal being reflected by the optical fiber network;

a test signal transmitter for transmitting a second test signal having a second wavelength to the fiber optic network under control of the drive assembly;

And a data signal receiver, configured to receive a second data signal having the second wavelength, and receive a second reflected signal generated by the second test signal being reflected by the optical fiber network.

2. The optical transceiver module of claim 1, wherein the drive component comprises a test processor, a data signal driver, and a test signal driver;

The test processor is configured to initiate a test mode, and preprocess the first reflected signal and the second reflected signal returned by the test signal receiver and the data signal receiver;

The test signal driver and the data signal driver are configured to respectively drive the data signal transmitter and the test signal transmitter to transmit the first test signal and the second test under control of the test processor signal.

3. The optical transceiver module of claim 1, wherein the drive component comprises a test processor and a data signal driver;

The data signal driver is configured to drive the data signal transmitter to transmit the first test signal under control of the test processor, and the test processor is further configured to drive the test signal transmitter to transmit the The first test signal.

The optical transceiver module according to claim 2 or 3, wherein the data signal driver is further configured to: under the control of the test processor, drive the optical transceiver module before entering the test mode The data signal transmitter transmits an instruction to suspend transmission of the second data signal to the peer device.

The optical transceiver module according to claim 4, wherein the driving component further comprises a channel selecting unit, wherein the channel selecting unit is configured to receive the second data signal receiver in a normal communication mode. Output The signal is forwarded to a data processing module of the optical line terminal, and the data signal receiver receives the second reflected signal to the test processor in a test mode.

6. The optical transceiver module of claim 1, wherein the optical component further comprises a fiber optic adapter and a filter component, the data signal transmitter, the data signal receiver, the test signal transmitter, and The test signal receiver is coupled to the fiber optic adapter by the filter component;

The filtering component is configured to provide a first data signal transmitted by the data signal transmitter and the first test signal and the second test signal transmitted by the test signal transmitter to the fiber optic adapter and output to the a fiber optic network; further configured to provide a second data signal and a second reflected signal input from the fiber optic adapter to the data signal receiver, and provide a first reflected signal input from the fiber optic adapter to the test Signal receiver.

The optical transceiver module according to claim 6, wherein the filtering component comprises a first wavelength division multiplexing filter sequentially disposed along a direction of a main optical path extending from the optical fiber adapter, and a second wave splitting Using a filter and a splitter filter;

The first wavelength division multiplexing filter is configured to transmit an optical signal having the first wavelength, and the partially reflective portion transmits an optical signal having the second wavelength;

The second wavelength division multiplexing filter is configured to transmit an optical signal having the first wavelength and reflect an optical signal having the second wavelength;

The beam splitter filter is configured to partially transmit an optical signal having the first wavelength.

8. The optical transceiver module of claim 7, wherein the data signal receiver is coupled to a reflected optical path of the first wavelength division multiplexing filter, and the test signal transmitter is coupled to the first A reflected optical path of the two wavelength division multiplexed filter, the data signal transmitter being coupled to a transmitted optical path of the optical splitter filter, the test signal receiver being coupled to a reflected optical path of the optical splitter filter.

9. The optical transceiver module of claim 7, wherein the test signal transmitter is coupled to a reflected optical path of the first wavelength division multiplex filter, and the data signal receiver is coupled to the first A reflected optical path of the two wavelength division multiplexed filter, the data signal transmitter being coupled to a transmitted optical path of the optical splitter filter, the test signal receiver being coupled to a reflected optical path of the optical splitter filter.

The optical transceiver module according to claim 6, wherein the filtering component comprises a first beam splitter filter, a second beam splitter filter, and a wavelength division multiplexing filter;

The wavelength division multiplexing filter is disposed on a main optical path extending along the fiber optic adapter for transmitting an optical signal having the first wavelength and reflecting an optical signal having the second wavelength; The first beam splitter filter is disposed on a reflected light path of the wavelength division multiplexing filter, and is configured to partially transmit an optical signal having the first wavelength;

The second beam splitter filter is disposed in a transmitted optical path of the wavelength division multiplexing filter for transmitting a partially reflective portion to an optical signal having the second wavelength.

11. The optical transceiver module of claim 10, wherein the test signal transmitter and the data signal receiver are respectively coupled to a transmitted optical path and a reflected optical path of the first optical splitter filter, and The first beam splitter filter is packaged to the first T0-CAN module;

The data signal transmitter and the test signal receiver are coupled to a transmitted optical path and a reflected optical path of the second optical splitter filter, respectively, and packaged with the second optical splitter filter to a second T0-CAN module.

The optical transceiver module according to claim 6, wherein the filtering component comprises a beam splitter filter, a first wavelength division multiplexing filter, and a second wavelength division multiplexing filter;

The beam splitter filter is disposed on a main optical path extending along the fiber optic adapter, the partially transmissive portion for reflecting an optical signal having the first wavelength, and the partially transmissive portion for reflecting an optical signal having the second wavelength;

The first wavelength division multiplexing filter is disposed on a reflected optical path of the optical splitter filter for transmitting an optical signal having the second wavelength and reflecting an optical signal having the first wavelength;

The second wavelength division multiplexing filter is disposed in a transmission optical path of the optical splitter filter for transmitting an optical signal having the first wavelength and reflecting an optical signal having the second wavelength.

The optical transceiver module according to claim 12, wherein the test signal transmitter and the test signal receiver are respectively coupled to a transmitted optical path and a reflected optical path of the first wavelength division multiplexing filter, And packaging the first wavelength division multiplexing filter to the first T0-CAN module;

The data signal transmitter and the data signal receiver are respectively coupled to the transmission optical path and the reflected optical path of the second wavelength division multiplexing filter, and are packaged with the second wavelength division multiplexing filter to the second T0 -CAN module.

A passive optical network system, comprising: an optical line terminal, a plurality of optical network units, and an optical distribution network, wherein the optical line terminal is connected to the plurality of optical network units through the optical distribution network, wherein The optical line terminal and/or the optical network unit includes an optical transceiver module integrated with a test function, and the optical transceiver module employs the optical transceiver module according to any one of claims 1 to 13.

An optical line terminal, comprising: a data processing module and an optical transceiver module, wherein the optical transceiver module uses the optical transceiver module according to any one of claims 1 to 13, the data processing module is used for Providing the first data signal to the optical transceiver module for transmitting, and performing data processing on the optical data transceiver module in combination with the received second data signal, and the data processing module is further configured to be used according to the optical transceiver module First received The reflected signal and the second reflected signal are used to analyze the optical fiber line.

16. A fiber optic detection method for a passive optical network, comprising:

In the event of a failure of the passive optical network, it is determined whether the fault occurs in the backbone optical fiber or the distributed optical fiber of the optical distribution network;

If yes, the first test signal is sent to the optical distribution network by using a downlink wavelength, and the fault of the trunk fiber or the distribution fiber is located according to the reflected signal of the first test signal;

If not, the second test signal is sent to the optical distribution network by using an uplink wavelength, and the failed branch fiber or optical network unit is determined according to the reflected signal of the second test signal.

The method according to claim 16, wherein the first test signal and the downlink data signal are transmitted by using the same transmitter of the optical transceiver module, and the reflected signal and the uplink data of the second test signal are The signal is received by the same receiver of the optical transceiver module.

18. An optical fiber detection system, comprising: an optical line terminal, a plurality of optical network units, and an optical distribution network, wherein the optical line terminal is connected to the plurality of optical network units through the optical distribution network;

The optical distribution network includes a first stage splitter and a plurality of second stage splitters, the first stage splitter being connected to the optical line terminal through a trunk fiber and connected to the plurality of second through a distribution fiber a grading splitter, wherein the plurality of second-stage optical splitters are respectively connected to the optical network unit through a branch fiber;

The optical line terminal includes an optical transceiver module, and the optical transceiver module is configured to send a first test signal to the optical distribution network by using a downlink wavelength, and according to the reflected signal of the first test signal, to the trunk optical fiber or Locating the fault of the distributed fiber; and transmitting the second test signal to the optical distribution network by using the uplink wavelength, and determining the faulty branch fiber or optical network unit according to the reflected signal of the second test signal.

The optical fiber detecting system of claim 18, wherein the optical transceiver module transmits the downlink data signal and the first test signal by using the same optical transmitter, and receives the uplink data by using the same optical receiver. a signal and the second reflected signal.